Antenna mast assembly



Aug. 2, 1955 N. V. DOYLE ANTENNA MAST ASSEMBLY Filed June 15, 1953 JNVENTOR.

Norman V. Day/e ATTORNEIIS' United States Patent Ofiice 2,7 14,4 96 E atented Aug. 2, l 955 ANTENNA MAST ASSEMBLY Norman V. Doyle, Marlin, Tex. Application June 15, 1953, Serial No. 361,561 3 Claims. (Cl. 248-38) This invention relates to new and useful improvements in antenna mast assemblies.

One object of the invention is to provide an improved antenna mast readily lending itself to erection at the edge of the roof of a building.

A further object of the invention is to provide an improved antenna mast which may be attached to a building at the edge of the roof thereof and extended well above the usual ten or twelve foot elevation of such masts above said roof, without the necessity of the workmen going upon the roof and in a much shorter time than is usually required to install reasonably high antenna masts.

Another object of the invention is to provide an improved antenna mast having an auxiliary support and arranged on a base so that it may be turned from the ground to rotate the antenna in an orbit approaching 360 degrees, whereby an amplified range of reception may be had.

Still another object of the invention is to provide an improved antenna mast, particularly lending itself to relative high antennas and which has a base support and a roof support, as Well as a longitudinal brace, whereby the use of guy wires and the like is eliminated.

A still further object of the invention is to provide an improved antenna mast of relatively high elevation, with respect to one-story buildings, which includes an element readily attachable to the margin of a building roof and in which the mast is vertically slidable and adjustable, whereby the mast may be readily installed and removed at a low cost.

Another object of the invention is to provide an antenna of the character described involving a post, a sleeve, a sectional mast, an antenna pipe or tube and an antenna mounted on the upper end of the antenna pipe, the sleeve being longitudinally adjustable on the post and the mast being longitudinally adjustable in the sleeve, whereby two men may assemble the foregoing elements on the ground, then raise them to a vertical position against the roof of a building and complete the installation of the mast without going upon the roof of the building or employing guy wires to brace the mast.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawing, wherein an example of the invention is shown, and wherein:

Fig. 1 is a perspective view of one end of a cottage having installed thereon, an antenna mast constructed in accordance with the invention,

Fig. 2 is an enlarged perspective view of the mast, parts of the mast being broken away,

Fig. 3 is an enlarged perspective view of the supporting sleeve, parts of the sleeve being broken away,

Fig. 4 is an enlarged end elevational view of a portion of a cottage roof with a bracket constructed in accordance with the invention attached. thereto and a portion of a supporting post fastened in said bracket,

Fig. 5 is a horizontal, cross-sectional view taken on the line 55 of Fig. 4, and

Fig. 6 is a front elevational view of a modified form of the mast base.

In the drawings, the numeral 10 designates an upright or vertical post which may be ordinary steel pipe or other suitable material and is of a length to extend to the vicinity of the apex or other portion of the building roof with which it is used. may be secured in the ground or to any other base and in Fig. 1, it is shown as embedded in the ground a substantial distance. The upper end of the post is shown as terminating just above the apex of the roof A of a building B and secured by a bracket, indicated generally by the numeral 11. The location of the post and the bracket is variable and they may be positioned at any suitable marginal edge of a roof. This bracket includes a transverse mounting plast 12 having apertures 13 adjacent each end, receiving lag screws 14 inserted in the face or faces of the end roof rafter or rafter C, or the plate may be secured to the marginal edge of a roof in any suitable manner.

The plate is spaced from the faces of the rafters C, which usually are disposed inwardly of the edges of the roof, by a number of washers 15 placed on the screws between the plate 12 and said rafters. On each side of the center of the outer face of the mounting plate, eye bolts 16 are inserted and secured by nuts 17 tightened against the rear face of said plate whereby the eyes are rigidly held in upright spaced order. A semi-circular clamp bar 18 is passed horizontally through the eye bolts and has its outer ends screw-threaded to receive the cars 19 at the ends of an arcuate bridle 20, whereby the upper end portion of the post 16 may be securely clamped between the bridle and the spaced eyes of the bolts 16. The ears are fastened and the bridle held in firm engagement with the post by nuts 21 screwed into the ends of the clamp bar. It is obvious that the plate 12 may be disposed on the edge of a roof at an angle and. the eye bolts 16 inclined accordingly to support the post in a vertical position.

Once installed, the post becomes a permanent support for the upper portion of a mast 21. As a means for maintaining the mast in an upright position and permitting, when desired, vertical adjustment or movement of said mast, an elongate sleeve 22 is adjustably secured on the upper portion of the post. Collars 23, welded or otherwise aflixed in spaced relationship to the lower portion of the sleeve and projecting laterally therefrom, are mounted to slide vertically on the post 110. The collars carry set screws 24, adapted to be tightened in engagement with said post. The mast, which is preferably formed of lengths of steel pipe, but which may be made of any suitable material, telescopes or extends through the sleeve 22, the bottom of the mast resting on a suitable base or block 25, partially embedded in the ground or otherwise disposed and the top of the mast projecting upwardly from the sleeve. The base 25 is, of course, close to the post but extends outwardly thereof.

A reducing nipple 26 is screwed onto the upper end of the mast and receives the lower screw-threaded end of an upright antenna pipe or tube 27 which has mounted on its upper end portion, a suitable antenna 28 of any desired design. On the lower portion of the mast a collar 29 is suitably fastened by a set screw 30.. The mast is in such close proximity to the post 10, that upon rotation of the mast either to the right or to the left, the screw 30 will strike the post and prevent further rotation. precautionary means will eliminate undue rotation of the mast.

The lower end of the post end of the post, said post being suitably supported on the ground in a prone or horizontal position. A length or section of the mast 21 is passed through the sleeve so that its ends project beyond the ends of the sleeve and the tube 27 is then secured to one end of the mast section by means of the coupling 26. The antenna 28 'is fastened on the outer end of the tube and the set screws 31, in the ends of the sleeve, are tightened to hold the mast in place; while set screws 24 in the collars 23 are also tightened against the post to hold the sleeve in position.

The bracket 11 is installed at the edge of the roof and the bridle 20 is removed. The hole for the post 10 is dug and the block 25 is east or placed in position. The mast assembly is picked up by two workmen, one of whom guides the post into and the other man, mounting a ladder, swings the upper end of the post against the eyes of the bolts 16, pulls the clamp bar 18 into position and then mounts and fastens the bridle 20 against the upper end portion of the post above erection is completed, the set screws 24 are loosened so that the sleeve 22 may be slid upwardly, with respect to the post, and said screws again tightened. As shown in Fig. 1, the upper and medial portions of the sleeve will extend above next loosened and the mast section is then moved upwardly until its lower end is adjacent the bottom of the sleeve, after which adjustment, the screws are again tightened. 7

By the foregoing adjustments elevated to a substantial distance above the roof A, as for instance, thirty-five feet above the ground. The erection of the mast is finished by mounting an additional length of pipe 32 on the base 25 and securing its upper end to the uppermost section. 27 being hollow the antenna wires (not shown) may be inserted in the upper end of the tube and pulled down through said tube and the mast to a suitable outlet, or they may be extended down exteriorly of the mast.

It is believed the method of dismantling or lowering the antenna 28 will be obvious. By reason of the relatively long sleeve 22, the mast is braced at the roof and above and below the same so that no guy wires or other additional stays or supports are necessary. It is further pointed out that the mast 21 may be rotated 2 to within a few degrees of full orbit, by turning said mast from the ground and without going upon the roof or lowering the antenna. If the screws 31 have been tightened, they of course would have to be loosened before the mast could be rotated. The manner of attaching the bracket 11 to the house is simple and the bracket is a very useful fixture. By reason of the elements, their mountings and associations, the invention makes for a great saving of labor and time. One of the advantages of the invention as that it is particularly adapted to relatively high masts such as elevations of thirty-five to forty-five feet. It has been estimated that in erecting the masts now in common use the services of two men for periods of five to six hours are required, whereas two men can compiete the erection of the mast herein set forth in about one hour.

In place of the plate or base 25, a flanged pin 33, as shown in Fig. 6, may have its shank driven into the ground and the lower end of the lower mast section 32 the hole in the ground the collars 23. When this portion of the the roof A. The set screws 31 are y the antenna may be i The mast 21 and the tube herein before set forth is slipped over the projecting upper end or head of the pin.

The foregoing description of the invention is explanatory thereof and various changes in the size, shape and materials, as well as in the details of the illustrated construction may be made, within the scope of the appended claims, without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

1. An antenna mast assembly including, an upright post adapted to be mounted in the ground at its lower end, means for securing the upper end of the post to the upper portion of a building, a sleeve carried by the upper end.

portion of the post and extending a substantial distance i above the building, the sleeve having elements projecting laterally therefrom and slidably received on the post, means for holding the latter elements against sliding on the post, a. mast extending through the sleeve with its lower end adjacent a ground level and its. upper end a substantial distance above the sleeve, the mast being vertically slidable in the sleeve, means for securing the mast in the sleeve, and an antenna support on the upper end of the mast.

2. An antenna mast assembly including, an elongate sectional mast adapted to extend from ground level adjacent a building to a point considerably elevated above the roof of the building, an elongate tubular sleeve slidably receiving the mast and through which at least those sec tions of the mast above the lowermost section are slidable, the sleeve being of sufficient length to extend vertically from below the roof of the building to a point well thereabove, supporting means holding the sleeve against lateral movement but permitting vertical movement of the sleeve, said supporting means being tightenable for holding the sleeve vertically elevated, releasable means for securing the mast against movement in the sleeve, and means for holding the lower end of the mast against lateral or downward movement.

3. An antenna mast assembly including, an elongate sectional mast adapted to extend from ground level adjacent a building to a point considerably elevated above the roof of the building, an elongate tubular sleeve slidably receiving the mast and through which at least those sections of the mast above the lowermost section are slidable, the sleeve being of sunicient length to extend vertically from below the roof of the building to a point well thereabove, supporting means holding the sleeve against lateral movement but permitting vertical movement of the sleeve, said supporting means being tightenable for holding the sleeve vertically elevated, releasable means for securing the mast against movement in the sleeve, a ground support for the lower end of the mast, and means for holding the lower end of the mast against lateral movement, the lower end of the sleeve being spaced above the ground support a distance greater than the length of the lowermost mast section when the sleeve is held vertically elevated by tightening of the supporting means.

.eferences Cited in the file of this patent UNITED STATES PATENTS 635,612 Tardell Oct. 24, 1899 2,530,740 Taylor Nov. 21, 1950 2,534,894 Zedler Dec. 19, 1950 2,686,029 Raymond Aug. 10, 1954 2,690,318 Kusiv Sept. 28, 1954 OTHER REFERENCES La Pointe-Plascomold Corp. Leaflet V, VeeD-X, Mar. 10, 1949. (Available Div. 51.)

Andrew Coaxial Antenna, Bulletin 950, Apr. 20.

Camburn Inc. Catalog, Cameo, MarchdO, 1949 (Available Div. 70.) 

